#define _CRT_SECURE_NO_WARNINGS 1

class Solution {
public:
    vector<int> searchRange(vector<int>& nums, int target) {
        if (nums.empty()) return { -1, -1 };
        int left = 0, right = nums.size() - 1;
        vector<int> ret;
        while (left < right)
        {
            int mid = left + (right - left) / 2;
            if (nums[mid] < target) left = mid + 1;
            else right = mid;
        }
        if (nums[left] == target) ret.push_back(left);

        left = 0, right = nums.size() - 1;
        while (left < right)
        {
            int mid = left + (right - left + 1) / 2;
            if (nums[mid] > target) right = mid - 1;
            else left = mid;
        }
        if (nums[left] == target) ret.push_back(left);

        if (ret.empty()) return { -1, -1 };
        else return ret;
    }
};